Install current version of Ansible when testing instead of 1.5.0.

.travis.yml

@@ -10,7 +10,7 @@ before_install:
 
 install:
   # Install Ansible.
-  - pip install ansible==1.5.0
+  - pip install ansible
 
   # Add ansible.cfg to pick up roles path.
   - "printf '[defaults]\nroles_path = ../' > ansible.cfg"